/Engine/Source/Runtime/Experimental/Iris/Core/Public/Iris/ReplicationState/ReplicationStateDescriptor.h
To be able to enable/disable custom conditional properties we need a fast way to go from RepIndex to MemberIndex.
struct FReplicationStateMemberRepIndexToMemberIndexDescriptor
uint16
MemberIndex
MemberIndex whose property RepIndex matches the index of this entry. ~0 if this entry is invalid.